Can someone help me with these physics problems

Posted on 2015-09-23 07:01:00 in Physics by ALINA

1. Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 240 m/s2 for 20 ms, then travels at constant speed for another 30 ms.
Part A
During this total time of 50 ms, 1/20 of a second, how far does the tongue reach?
Express your answer to two significant figures and include the appropriate units.

2. A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.7 m/s2 .
Part A
How much time elapses before the motorcycle is moving as fast as the car?
Express your answer to two significant figures and include the appropriate units.
Part B
How far is the motorcycle from the car when it reaches this speed?
Express your answer to two significant figures and include the appropriate units.

3. When jumping, a flea rapidly extends its legs, reaching a takeoff speed of 1.0 m/s over a distance of 0.50 mm .
Part A
What is the flea's acceleration as it extends its legs?
Express your answer to two significant figures and include the appropriate units.

4. When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.9 m/s in 0.15 s .
Part B
How far does the pike move during this strike?
Express your answer using two significant figures.

---

Answer Comment

No Answers Posted Yet.